Jump to main content
Jump to site search


Ultrafast cation insertion-selected zinc hexacyanoferrate for 1.9 V K–Zn hybrid aqueous batteries

Author affiliations

Abstract

The low energy/power density of aqueous rechargeable batteries (ARBs) have limited their further development and application because of their voltage limitation of 1.23 V. Herein, K–Zn hybrid ARBs with a high discharge voltage of 1.937 V are reported for the first time. The selective ionic insertion/extraction mechanism into/from the zinc hexacyanoferrate (ZnHCF) cathode in the hybrid electrolyte was clearly revealed by in situ X-ray diffraction. The cathode material displays an outstanding rate capability of 300C and a high capacity of 78.7 mA h g−1. The constructed K–Zn hybrid ARBs exhibit an energy density of 67 W h kg−1, a high power density of 4.76 kW kg−1 and excellent rate performance with 67.6% capacity retention from 2C to 60C. These excellent performances contribute to the selected K+ insertion mechanism. These exciting results can offer an alternative path for the development of hybrid aqueous batteries for stable and high energy/power density energy storage techniques.

Graphical abstract: Ultrafast cation insertion-selected zinc hexacyanoferrate for 1.9 V K–Zn hybrid aqueous batteries

Back to tab navigation

Supplementary files

Article information


Submitted
10 Dec 2019
Accepted
12 Feb 2020
First published
25 Mar 2020

J. Mater. Chem. A, 2020, Advance Article
Article type
Paper

Ultrafast cation insertion-selected zinc hexacyanoferrate for 1.9 V K–Zn hybrid aqueous batteries

M. Huang, J. Meng, Z. Huang, X. Wang and L. Mai, J. Mater. Chem. A, 2020, Advance Article , DOI: 10.1039/C9TA13497B

Social activity

Search articles by author

Spotlight

Advertisements